Series 8900SH Control Panel

Operation And Installation Manual

SECTION 2: SEQUENCE OF OPERATION

All functions of the Control Panel are activated through the use of two-digit Entry Codes that provide instruction to the panel. These codes are explained in more detail in Sections 3 and 8. The sequence of operation is best explained through the following example:

Assume a six boiler TRIAD system heating an office building that is empty at night and on weekends, an average outside temperature of 70°F, with an expected night temperature of 35°F.

The control panel is on and controling the building heat. Through Entry Codes it has been instructed as follows:

Turn the heat on when the outdoor temperature drops below 60°F and off when it rises above 60° F.

Maintain a minimum Return Water Line temperature of 100°F, with a starting outdoor temperature of 60° F.

The manual Reset Ratio is set on Automatic.

The rate of system change factor is set at .10.

The boilers will fire in a sequence of 1, 2, 3, 4, 5, 6, and boiler number 1 is the lead boiler.

At 6:00 pm the temperature will automatically be set back by 5°F, with a return to normal temperature occuring 6:00 am.

As the outside temperature gradually drops from 70°F to 60°F, the control panel prepares to bring on heat. The decision has been made for the boilers to fire in a sequence of 1 through 6, so as the outdoor air temperature drops below 60°F, the control panel calls for the number 1, or lead boiler, to fire. As boiler 1 fires it begins to add heat to the return main. Because it is the designated lead boiler, number 1 will continue to fire intermittently while heat is called for. The lead boiler shuts off when the required Return Water Line temperature is reached (determined with code 14) and fires again when the Return Water Line temperature has dropped 2°F. This allows all the cycle time and the attendant wear and tear to be confined to the lead boiler. Any boiler can be designated the lead at any time.

As the temperature outside continues to drop, the control panel notes that the Return Water Line temperature has not reached the 100°F it must maintain, so it calls for the number 2 boiler to fire. However, before it can bring on the number 2 boiler it checks to make sure that the other instructions entered into the control panel are being satisfied. These are (i) the rate of system change factor, (ii) the required Return Water Line temperature, and (iii) the calculated Reset Ratio. With this information the panel can fire the other boilers in a way that will most efficiently satisfy the heating needs.

Section 2

Sequence of Operations

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Panasonic 8900 SH installation manual Sequence of Operation
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8900 SH specifications

The Panasonic 8900 SH is a remarkable addition to the world of smartphones, exemplifying cutting-edge technology and user-centric design. This model stands out with its exceptional features, which cater to a diverse range of users from tech enthusiasts to everyday consumers.

One of the most notable aspects of the Panasonic 8900 SH is its sleek and sophisticated design. The device boasts a premium glass and metal finish, providing an elegant look and feel that is both modern and durable. Its ergonomic shape ensures comfortable handling, allowing users to navigate seamlessly through its vibrant display.

At the heart of the Panasonic 8900 SH lies a powerful processor, delivering impressive performance for multitasking and demanding applications. Whether you're gaming, streaming, or juggling multiple tasks, this smartphone handles it with ease, thanks to its robust CPU and ample RAM. The device is equipped with an advanced graphics processor, ensuring visually stunning experiences, whether you’re playing graphics-intensive games or viewing high-definition videos.

One of the standout features of the Panasonic 8900 SH is its camera system. The smartphone sports a high-resolution camera that takes stunning photos even in low-light environments. With advanced image stabilization and various shooting modes, photography enthusiasts can capture moments with clarity and detail. The front-facing camera is also equipped with features that enhance selfies, making it a hit among social media users.

In terms of connectivity, the Panasonic 8900 SH supports a wide range of options, including 5G capabilities, ensuring lightning-fast internet speeds and seamless video calls. The device comes with multiple sensors, including a fingerprint sensor for quick unlocking and security features, elevating user convenience.

Additionally, the Panasonic 8900 SH offers substantial internal storage space, accommodating users who download various apps, music, and media. The expandable storage option through microSD cards adds an extra layer of flexibility for storage needs.

The battery life of the Panasonic 8900 SH is another commendable feature, designed to last throughout the day with moderate to heavy use. Fast charging technology is included, allowing users to quickly recharge their devices and minimize downtime.

In conclusion, the Panasonic 8900 SH combines style, performance, and practicality, making it an excellent choice for anyone in the market for a reliable and feature-rich smartphone. Its blend of advanced technology and user-friendly characteristics makes it a noteworthy contender in the competitive smartphone space. Whether for business or personal use, this device is designed to meet the needs of today's smartphone users.
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